Final answer:
New markets for iPods, PDAs, and WiFi have emerged as a result of disruptive technologies, which introduce vibrant alternatives to existing markets, often leading to significant shifts in industry dynamics and global competition among firms.
Step-by-step explanation:
New markets created by iPods, PDAs, and WiFi are a result of a. disruptive technologies. Disruptive technologies typically introduce innovations into a new market not currently being served, improving over time to surpass existing technologies and eventually displacing them. This is exemplified in the evolution of the computer industry, where the introduction of personal computers created a market for hobbyists and home users, eventually expanding and overtaking the market previously dominated by mainframes and minicomputers.
Such technological advancements have a notable effect on firm size and market competition, leading to a continuous debate regarding whether new information and communication technologies will lead to conglomerates dominating markets or allow a larger number of small firms to thrive. The advent of the internet and improved communication technologies have expanded the reach of both consumers and businesses, enabling them to participate in global competition. This has also influenced the way local markets operate, drastically increasing the level of competition they face from all over the world.